Patents
Sitemap › H04 - Electric communication technique › H04B - Transmission › H04B 10 - Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
Patents for H04B 10 - Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication (73,125)
12/1981
12/15/1981US4306313 High reliability optical fiber communication system
12/09/1981EP0041358A2 Non-polarizing thin film edge filter and fiber optic communication systems incorporating such filters
12/02/1981EP0040706A1 Optical communication system
12/01/1981US4303855 System for separating an optical signal from ambient light
12/01/1981CA1113543A1 Ttl compatible led driver circuit
11/1981
11/24/1981CA1112894A1 Device for measuring the attenuation of optical waves in an optical transmission path
11/17/1981US4301543 Fiber optic transceiver and full duplex point-to-point data link
11/17/1981US4301463 Indium and indium gallium arsenic phosphide layers
11/17/1981US4300816 Wide band multicore optical fiber
11/17/1981US4300811 III-V Direct-bandgap semiconductor optical filter
11/11/1981EP0039475A1 Rotary annular signal data coupler
11/10/1981US4300239 Optical repeater monitoring system
11/10/1981US4300018 Electronic relay arrangement
11/10/1981CA1112085A1 Reversible light beam coupler
11/03/1981US4298794 Fiber optic hot spot detector
10/1981
10/28/1981EP0038733A2 Telecommunication photodiode with small dark current
10/28/1981EP0038563A2 Optical system with high coupling efficiency, in particular for attenuation measurement apparatuses employing the back-scattering technique
10/27/1981US4297656 Plural frequency oscillator employing multiple fiber-optic delay line
10/27/1981US4297653 Hybrid semiconductor laser/detectors
10/21/1981EP0037857A1 Method for the transmission of analog information through optical fibres and installation for carrying out the method
10/20/1981US4296412 Method and apparatus for signal transmission
10/20/1981US4296319 Waveform synthesizer
10/14/1981EP0037793A2 optical communication transmission system
10/14/1981EP0037575A1 Circuit with a laser diode for transmitting information signals over an optical fibre
10/14/1981EP0037460A1 Process and installation for regulating pressure and fluidisation of a pulverized mass in a distribution container
10/13/1981US4295226 High speed driver for optoelectronic devices
10/13/1981US4295225 Fiber optic repeater
10/13/1981US4294682 Data acquisition systems
10/13/1981US4294509 Optical circulators
10/07/1981EP0037263A1 Optical waveguide device
10/06/1981CA1110328A1 Optical communication transmission arrangements
10/01/1981WO1981002782A1 Apparatus and method for nighttime and low visibility alignment of communicators
09/1981
09/29/1981US4292606 Modulation current control of laser diodes
09/29/1981US4292537 System for testing optical fibers
09/29/1981US4292512 Optical monitoring photodiode system
09/29/1981US4291943 Connector for optical fiber cables
09/29/1981US4291939 Polarization-independent optical switches/modulators
09/22/1981US4291411 Remote control for radiotelephones
09/15/1981US4290146 Measuring device for transmitting measuring signals via an optical link
09/15/1981US4289399 Light signal observation device
09/15/1981US4289398 Optical time domain reflectometer
09/15/1981US4289373 Bidirectional optical fiber transmission system
09/15/1981CA1108901A1 System for flat ribbon optical fiber data communications link
09/09/1981EP0035485A1 Laser transmitter with an amplifier-controlled semi-conductor
09/09/1981EP0035057A1 Device for data transmission between parts of a machine tool rotating relative to each other
09/08/1981US4288740 Constant current switch
09/08/1981CA1108431A1 Echometre for localising defects affecting light conductors
09/02/1981EP0034957A1 Automatic output power regulating device for the emitter module of a fibre-optical transmission system
09/02/1981EP0034859A1 Infra-red data transmission system
09/01/1981US4287606 Fiber optic transmission line stabilization apparatus and method
09/01/1981US4286838 Compact optical structure with integrated source
09/01/1981CA1108326A1 Telephone set for optical fibers lines
08/1981
08/25/1981CA1107822A1 System and method of modulation and demodulation for optical fibre digital transmission
08/19/1981EP0034107A1 Optical encoder using time domain multi-plexer
08/19/1981EP0034082A2 Insufficient transmission level alarm triggering device for the receiver module of a fibre-optical transmission system
08/18/1981CA1107380A1 Dual polarization electromagnetic switch and modulator
08/12/1981EP0033631A2 Processor arrangements
08/12/1981EP0033445A1 Passive bus system for decentrally structured multicomputer systems, especially for multimicrocomputer systems
08/11/1981CA1106907A1 Power supply system for a semiconductor light source
08/05/1981EP0032981A1 Domestic emergency calling system with remote release
08/04/1981US4282605 Sound reproducing with remote amplifying transducer
08/04/1981US4281893 Super wide band light transmitting system
08/04/1981CA1106483A1 Diode capable of alternately functioning as an emitter and detector of light of the same wavelength
08/04/1981CA1106482A1 Unidirectional optical device and regenerator
07/1981
07/28/1981US4281416 Light source system in an optical transmission repeater
07/28/1981US4281253 Applications of dual function electro-optic transducer in optical signal transmission
07/28/1981US4280751 Two-way coupler for branched light-transmission network
07/21/1981US4279465 Device for transmitting and receiving optical data on the same optical transmission line
07/15/1981EP0031874A1 Electrical installation arrangement
07/14/1981US4279036 Secure communication system
07/14/1981US4278900 Fail-safe pulse providing apparatus
07/14/1981US4278850 Monitoring system for optical transmission line repeaters
07/08/1981EP0031557A1 Apparatus for optical telephony
07/08/1981EP0031458A2 Light-wave guide frequency multiplex transmission system
07/08/1981EP0031404A1 Remote control circuit
07/07/1981US4277846 Circuit for stabilizing the output of an injection laser
07/07/1981US4277755 Circuit arrangement for driving nonlinear threshold devices
06/1981
06/30/1981US4276656 Apparatus and method for replacement of a parallel, computer-to-peripheral wire link with a serial optical link
06/23/1981CA1103766A1 Electroluminescent photodetector diode and busbar lines using said diode
06/16/1981US4274112 Switching matrix for selectively connecting incoming signals to desired output paths
06/16/1981US4274104 Electrooptical integrated circuit communication
06/02/1981US4271536 Discriminator threshold level control circuit for a digital transmission system
06/02/1981US4271503 Automatic control device for a receiver using a pilot
06/02/1981US4270839 Directional optical fiber signal tapping assembly
05/1981
05/28/1981WO1981001491A1 Subscriber telephone station
05/26/1981CA1101941A1 Two-terminal photodetectors with inherent ac amplification properties
05/20/1981EP0028751A1 Arrangement for transmitting information in light conductors
05/20/1981EP0028669A1 Method and device for stabilizing the light power carried by an optical fibre
05/19/1981US4268756 Optical transceiver
05/13/1981EP0028298A2 Method for the transmission of digital signals by means of a signal generator
05/12/1981US4267606 Wireless, multi-channel remote control unit for toys
05/12/1981US4267590 Fiber-optical data-communication system using carriers of different wavelengths
05/06/1981EP0027833A1 Telephone substation
04/1981
04/29/1981EP0027758A1 Automatic gain control device using optical means in a system for transmitting electric signals by an optical link
04/28/1981US4264982 Drive circuit for an infrared remote control transmitter
04/28/1981US4264896 Regulator arrangement useful in an infrared remote control transmitter
04/22/1981EP0027413A1 System for the simultaneous integral multiple-access transmission over optical fibre transmission lines
04/22/1981EP0027410A1 Switching method for time division multiplex signals transmitted by a carrier wave, particularly an optical wave, and device for putting it into use
04/21/1981US4263506 Pulse generating apparatus
04/15/1981EP0027043A1 Vehicle sound reproducing apparatus
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